DOWNLOAD LG 32LS679C (CHASSIS:LD21B) Service Manual ↓ Size: 6.57 MB | Pages: 53 in PDF or view online for FREE

Model
32LS679C (CHASSIS:LD21B)
Pages
53
Size
6.57 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
32ls679c-chassis-ld21b.pdf
Date

LG 32LS679C (CHASSIS:LD21B) Service Manual ▷ View online

Color
error?
Y
N
※ Check 
and replace 
Link Cable
(LVDS) and 
contact 
condition
Y
N
Replace Main B/D
Color
error?
Check error 
color input 
mode
Check color by input
-External Input
-COMPONENT
-
RGB
-
HDMI/DVI
Y
External device
/Cable
normal
External Input/
Component
error
Check 
external 
device and
cable
Y
External device
/Cable
normal
RGB/
HDMI/DVI
error
Check external 
device and  
cable
Replace Main B/D
Replace Main B/D
N
N
A. Video error
Color error 
A7
N
Y
End
Replace module
Request repair 
for external 
device/cable
Color
error?
Check Test pattern
A10
☞ A8/ A9
Standard Repair Process
Established
date 
Revised date 
5/14
LCD  TV
Error
symptom
2012. 01 .14
Screen
normal?
N
Y
Check external 
device 
connection 
condition
Y
N
Check and 
replace Link 
Cable
Normal?
Y
Screen
normal?
Replace 
module
Check color condition by input
-External Input
-Component
-
RGB
-
HDMI/DVI
End
Vertical/Horizontal bar, residual image, light spot
Request repair 
for external 
device
A. Video error
Vertical / Horizontal bar, residual image, 
light spot, external device color error 
A10
External device screen error-Color error
External 
Input
error
Connect other external 
device and cable
(Check normal operation of 
External Input, Component, 
RGB and HDMI/DVI by 
connecting Jig, pattern 
Generator ,Set-top Box etc. 
N
Y
Replace 
Main B/D
Screen
normal?
Check screen 
condition by 
input
-External Input
-Component
-
RGB
-
HDMI/DVI
Request repair for 
external device
Component
error
RGB
error
HDMI/
DVI
Connect other external 
device and cable
(Check normal operation of 
External Input, Component, 
RGB and HDMI/DVI by 
connecting Jig, pattern 
Generator ,Set-top Box etc. 
Replace 
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace Main B/D
Replace
Module
Screen
normal?
End
Established
date 
Revised date 
6/14
LCD  TV
Error
symptom
Standard Repair Process
A7
☞ A8/ A9
Check Test pattern
2012. 01 .14
N
B. Power error
No power
Power  LED
On?
Y
N
DC Power on
by pressing Power Key 
On Remote control
Y
N
Normal 
operation?
Check Power 
On ‘”High”
Check Power cord
was inserted properly
Check 
Power LED
Replace 
Power 
B/D
Measure voltage of each output of Power B/D
N
Y
Normal
voltage?
Replace Main B/D
N
Y
OK?
Replace Main B/D
N
Y
Normal?
Check ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power 
B/D
Y
A11
A12
A13
A4
Standard Repair Process
Established
date 
Revised date 
7/14
LCD  TV
Error
symptom
. Stand-By: Red
Close
2012. 01 .14
B. Power error
Off when on, off while viewing, power auto on/off
Error?
N
Y
Check Power Off
Mode
Fix A/C cord & Outlet 
and check each 3 
phase out
Check A/C cord
Check for all 3- phase
power out
Check outlet
Replace Main B/D
CPU
Abnormal 
(If Power Off mode 
is not displayed)
Check Power B/D 
voltage
Y
N
Replace Main B/D
Normal
voltage?
Replace Power B/D
Replace Power B/D
N
Y
Normal?
End
※ Caution
Check and fix exterior   
of Power B/D Part
A14
A13
Established
date 
Revised date 
8/14
LCD  TV
Error
symptom
Standard Repair Process
Status
Power off List
Explanation
Normal
"POWEROFF_REMOTEKEY"
Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER"
Power off by OFF TIMER
"POWEROFF_SLEEPTIMER"
Power off by SLEEP TIMER
"POWEROFF_INSTOP"
Power off by INSTOP KEY
"POWEROFF_AUTOOFF"
Power off  by AUTO OFF
"POWEROFF_ONTIMER"
Power off by ON TIMER
"POWEROFF_RS232C"
Power off by RS232C
"POWEROFF_RESREC"
Power off by Reserved Record
"POWEROFF_RECEND"
Power off by End of Recording
"POWEROFF_SWDOWN"
Power off by S/W Download
"POWEROFF_UNKNOWN"
Power off by unknown status except listed case
Abnormal
"POWEROFF_ABNORMAL1"
Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL"
Power off by CPU Abnormal
*  Please refer to the all cases which
can be displayed on power off mode.
Abnormal 
1
2012. 01 .14
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